A coepoeation oei



J. H. coYNE v Re, 18,097

SEMISLEEVE VALVE MOTOR original Filed Mrch :51, 1924 4 Sheets-sheet 1 June 16,A 1931.

l. IV l t 1.... L

J'. H. cow/NEl SEMISLEEVE VALVE MOTOR June` 16,1931

Original Filed Marton 31, 1924 4' Sheets-Sheet 2 EEE.. MVA

J. H. coYNE Re. 18,097

SEMISLEEVE VALVE MOTOR June 16, 1931.

Original Filed March 3l, 1924 4 Sheets-Sheet 3 www Sdn.

J. H. COYNE sEMIsLEEvE vALvB Io'ron June 16, 1931.

Original Filed Ilarch' 31, 1924 4 Sheets-Sheet 4 Reissued `une 16, 1931 UNITED STAT afs- PATENT OFFICE JOIIN' HEBER." COYNE, OrrOrFALOQNEw YORK, AssIeNOB, Bvmn'sim 'Ass'IiInrsif To 1x1-SLEEVE ENGINE COMPANY, 01;" ILLINOIS CHICAGO, ILLINOIS, A CORPORATIONOF' SM'IASLEVE VALVE Moron" origiuaifno. 1,549,297, dated August 11, 1925, sehn No. 703,107, nieu This invention relates to the so-called seiniparts in place before the assembly is com' pleted. This will more fully explained hereinafter.

In the drawings: l r

Fig. 1 is a vertical crosssection of the improved` engine.

Fig-2l is a section taken on the line 2 2 of Fig. 1.

4.Fig-3 is a cross section of'one of the cylindersshowin'g the junk ring 'and theretaining means therefor.

Fig. 4 isk a fragment-ary perspective of the junk ring. .v A

Fig. 5 is a fragmentary plan view of the pilot vcasting taken on the line 5 5 of Fig. 1.

Fig. 6'is a vertical cross section through a portion of thev engine taken on the line 6 6 of Fig. 5.

Figs. 7. and 8 are sectional details showing" modified forms of junk rings.

The so-Called semi-sleeve motor is 'not r broadly new. Such a'motor has -beenpreviously built and put into operationbutit has been found relatively difcult'to properly retainthe gases, for these escapev between the port and the sliding valve.

'A motor .ofthisftype is provided with av cylinder block a, provided with the usualv water jacket space b, the inset cylinder head c, exhaust manifold d, etc. A pair .of cylin-r der 'segments' o Isemi-sleeves f and g are reciprocated vertically bythe connecting rods f and g. These sliding cylinder segments control the'intake port h'andfjtheeiihaust port-i.l he connectingv rods aresuit ably timed to open and close the ports'at'vthe' proper times.

These semi-sleeve valves `reciprocfaitel 'b'etween an outer cylinder j vand a water "cooled" lnner cylinder 71:. kvNow-1t 1s necessaryI to' a'cl' curately seat the inner cylinder with respect to the outer cylinder so `that an Eabsolutely' ac`.

curate spaceAv is obtained order that the sleeves may not bind, norbe too loose. -Therefore, in order to'centertheinner cylindera Y water-cooled pilot web' m is provided. This web', I formasv a separatecastingfn `(see Fi' 5). rIvhis casting n is doweled Iby t-he dowe s" o -onto the upper engine-block casting so a's tobe absolutely accurately fitted' with' respect to the engine casting so as to properly center' the inner cylinders. through the castingfn into the crank case casting g. Suitable packing 11 is fitted onto either side of the casting n. In order'tornake definite reference to this castin "fn, I"shall call it the pilotcasting.Av 1t is tted inbetween the upper and lower' mainlcastin'gs fof 'the' engine inr much `the same 'way a gasket would be, but carriesthe' Water-cooled bridge m', whichisl provided with a pilot openingfor each cylinder 1c. These cylinders c arepro'pl erly centered withv respect to' the engine block at vthetop by' means of each cylinder head 0. The water'iscirculated into the pilot castings through the passageways)e (see Figs.

5 and 6)' cored out ofthe thickened portions,

10 inthe engine block casting.'

I n order .to'successfully seal the valves vat the ports, I' provide large junk 'rings s. The

' junk ring fits into a large.recesslofso'cket t in the inner cylinder andthe junk ringforrns quite a large part4 of the' sliding Surface on which the two @semi-sleeves slide. `There is 'one junk ring for each cylinder. Each A'junk ring is in the form of a large vsplitspring ring.`

A screw stud u isv screwed into vthe inner Cyl-v inder preferably through the perforation lv which runs through the junk rin at its meeting ends, as shown in Fig. 4. his retains the junk ring from turning around and causes the openings 'w and y of the exhaust and intake ports respectively to properly register with the corresponding openings in the inner cylinder.l l

There is used in connection with this junk ring a small end thrust ring m, or what might be termed a wedgin ring. This ring has a beveled upper sur ace that engages the beveled lower surface of the junk ring. Inasmuch as this ring tends to open out, it thrusts the junk ring tightl up against the top of its socket or seat andy the wed ing or end thrust ring itself crowds in at the ottom of the seat to gas-'seal the ring at the bottom; hence, gas cannot escape over the top or around the bottom of the junk ring. j

It will be noted that the wedging ring a: is placed at the bottom of the junk ring. The reason for this is that during the explosion stroke of .the motor when the compression reaches its highestvalue, the tendency of the sliding semi-sleeves is to drag the junk ring upwardly. This is due to the fact that when war y driven sleeve segment is considerly greater than the speed of the downwardly traveling sleeve segment, hence there is ma differential action tending to drive the junk ringV upwardly.V By placing the wedging at the bottom, its spring pressure, toge er with this differential drag, both tend to seal the junk ring at its ends in the junk ring seat and thereby make as tight aseal as possible against 'the gases when they are under the highest compression. If the wedgingring were placed the top of the junk ring the upward drag of thejunk ring during the working stroke of the motor would lessen the pressure of the wedging ring tending to seal the junk ring at both ends. This therefore becomes an 11n ortant factor in sealing the junk rin an preventing gases escaping from behin it. f

With the improved separate pilot casting which I'have described, the motor can bev can be dropped over the crank case casting by means of a suitable block and tackle. The

I workman may then gradually drop and fit it over the pistons which areprojecting Vupivwardly.' VThe semi-sleeves are then Afitted the exllosion takes-place the speed of thev around the inner cylinder and connected up with the sleeve operating connecting rods; thereupon the engine block casting can be drop ed over the sleeves and the inner cylinders y the aid of a block and tackle, the dowel pins 0 accurately guiding the upper casting onto the pilot casting. The bolts p may then be inserted in the bolt holes and the three castings securely bolted together.

It will be seen that the water passages through the pilot casting serve to take the circulating water to the lnner cylinder casting. The bolts 1 by which the inner cylinders are bolted to the pilot castings securelyv lock the inner'cylinders to the pilot casting and with the interposed gasket 2, make a water tight connection. It will thus be evident that with my improved pilot casting the assembly is much easierand Abetter accomplished than would be otherwise.

Figs. 7 and 8 show modified forms of the junk; ring. In Fig. 7, there is a split wedging ring -a at the top and bottom of the junk rin whichtends to thrust in both directions. In ig. 8, a composite wedging ring :v-b is positioned atthe top and bottom of the junk ring for the same purpose.

What Iclaim is:

l. In an internal combustion engine, the combination of. an engine block provided with an outer cylinder having intake and exhaust passages, an inner cylinder provided with intake and exhaust ports registering A with said passages, said inner cylinder spaced from the outer cylinder, semi-sleeve valves operating in said space for controlling said ports, and a ported junk ring for sealing said valves with respect to the ports, said junk ring being sealed by thrust at both ends.

2. In an internal combustion engine,the t combination of an engine block provided withan outer cylinder having exhaust and intake passageways, an inner cylinder supported in spaced relation with respect to the outer cylinder and having intake and exhaust ports registering with said passageways, said inner cylinder provided with a junk ring seat,'a semi-sleeve valve structure a relatively large split ring having port open- A ings registering with the port openings in the inner cylinder.

3. In, an internalv combustion engine, the combination of an engine block provided Vwith an outer cylinder, an inner cylinder properly centered within the outer cylinder and spaced therefrom, the outer cylinder and inner cylinder provided with registering ports and passageways, a semi-sleeve valve structure provided with port openings and provided with port openings therethrough and operating in the space between the cylinoperating in said space, the inner cylinder being provided with a junk ring seat, a junk ring comprising a relatively large split ring having port openings registering with the ports in the inner cylinder and seated in said junk ring seat, and a wedging ring fitted into one end of the junk ring for giving the junk rin end thrust and sealing both ends of the jun ring and seat.

4. In an internal combustion engine, the combination of an engine block provided with an outer cylinder having exhaust and intake passageways, an inner cylinder supported in spaced relation with respect to the outer cylinder and provided with registering intake and exhaust ports, semi-sleeve valves operating in said space, a sealing ring for sealing the joint between the sliding semisleeves and the ports, and additional means for giving such sealing ring end thrust to prevent gases escaping behind said sealing ring at either end.

5. In an internal combustion engine, the combination of an engine vblock provided with an outer cylinder, a crank case, a separate ilot c-astin fitted in between the engine lock and te crank case, and .an inner cylinder havin its lower end removably fitted into the p1lot casting for centering the lower end of the inner cylinder with respect to the outer cylinder in spaced relation.

6. In an internal combustion engine, an engine block provided with an outer cylinder, a crank case casting, a pilot casting doweled into the engine block and fitted between the engine block and the crank case casting, said pilot casting provided with pilot openings, and inner cylinders centered in spaced relation with respect to the outer cylinders at their lower ends by having pilot portions removably fitted into the pilot openings of the pilot casting.

7. In an internal combustion engine, an engine block casting provided with a plurality of outer cylinders, a crank case casting, a pilot casting secured between the engine block casting and the crank case casting and having an accurately fitted relation with respect to the engine block casting, the said pilot casting provided with a bridge having a plurality of pilot openings, and inner cylinders having pilot portions removably fitted into said pilot. openings and thereby centered in spaced relation with respect to the outer cylinders.

8. In an internal combustion engine, an engine block casting provided with a plurality of outer cylinders with water jacket space, a crank case casting, a pilot casting secured between the engine block casting and the crank case casting and provided with water circulating space arranged to communicate with the water jacket of the engine block, said pilot casting provided with pilot openings and said inner cylinders provided with .pilot parts fitted' into the said pilot openings and providedwith water circulating space arranged to communicate with the water .circulating space of the Vpilotfcasting.

9. In an'internalvcombustion engine, the i.

sages, a semi-sleeve valve structure recipro-` cating in the said space, a junk ring and junk ring seat, said junk ring arranged to engage with the sleev'ie valve structure, the sleeve valve structure being arranged to operate so that there is an upward drag on the junk ring during the explosion stroke, and an end thrust ring crowding between the unk ring and its seat at the bottom of the junk ring.

10. In an internal combustion engine, an outer cylinder having intake and exhaust passages, an inner cylinder, a piston reciprocable in the inner cylinder, said inner cylinder being spaced from the outer cylinder, semi-sleeve valves operating in said space for controlling said passages, and a ported junk ring for sealing said valves with respect to the said ports, said junk ring being sealed at both ends by thrust.

ll. In an internal combustion engine, the combination of an engine block provided with an outer cylinder having intake and exhaust ports, an inner cylinder supported in spaced relation with respect to the outer cylinder, semi-sleeve valves operating in said space, a sealing ring for sealing the joint between the sliding semi-sleeve valves and the ports, and additional means for giving such sealing ring end thrust to prevent gases escaping behind said sealing ring at both ends.

12. An internal combustion engine ernbodying an engine block provided with an outer cylinder, a crank case, a crank in the case, a separate pilot casting, means supporting the casting, above the said crank, and an inner cylinder having its lower end removably fitted in the pilot casting for centering the lower end of the inner cylinder with relation to the outer cylinder in spaced relation.

l13. An internal combustion engine embodying an engine block provided with an outer cylinder, a crank case, a crank in the case, a separate pilot casting, means embody'- ing anchor bolts for supporting the casting above the said crank, and an inner cylinder having its lower end removably fitted in the pilot casting for centering the lower end ofv the inner cylinder with relation t-o the outer ing the castingabove the said crank, and an inner cylinder having its lower end reduced to forni 'a circumferential shoulder spaced from the lower extremity of the cylinder, said reduced-portion removably tting in said 5 casting for centering the lower end of the inner cylinder with relation to the outer cylinder in spaced relation, the said circumferential shoulder on the inner cylinder abutl ting the said pilot casting. -k

10 In testimony whereof, I have signed my ,name to this specification, on this 6th day of May, 1931. Y y JOHN HEBER COYNE. 

